I take it you are disagreeing with what I said, but I really don't understand what you just said. I will challange that a 12x6 at 10000rpm and a 10x6 at 10,000rpm must be on two seperate engines if at full throttle, or two different engines if at full throttle. The loading is much different.
12x6 will load at 124416
10x6 will load at 6000
AS you can see, the loading of a 12x6 is twice the 10x6.
ORIGINAL: rw Guinn
ORIGINAL: Geistware
Basically a plane being restrained will have a lower RPM compared to one that has unloaded in the air which will have a higher Rpm. I would consider that unless you are hovering, you will get higher RPM's and speed in the air.
there you go. I put the caveats in, and they went right over your head...put a governor on the engines, so they will only turn 10000 rpm
I will bet you that a 12x6 turning 10000rpm will pull a given (that means the exact same airplane) airplane at a higher speed than a 10x6 turning 10000 rpm. They will both get that given (same) airplane up to any spped you chose faster than a 10x4 turning the same rpm (10000)
the pitch helps you decide, and does have some significance. Bernouli gets a say-so in the equation, however...
ask a heli guy who uses a governor what happens to his pitch curves when he changes the disk diameter...